scholarly journals Industrial Crystallization: A Vital Process for the Modern Chemical Industry

2020 ◽  
Vol 43 (6) ◽  
pp. 1028-1028
Author(s):  
Adrian Flood ◽  
Lek Wantha
Keyword(s):  
Chemical Industry ◽  
Industrial Crystallization ◽  
Modern Chemical

Shelley and science

1992 ◽  
Vol 46 (2) ◽  
pp. 253-265
Keyword(s):  
Chemical Industry ◽  
Percy Bysshe Shelley ◽  
Great Good ◽  
Chinese Art ◽  
Scientific Interest ◽  
East Indies ◽  
Modern Chemical ◽  
James Watt ◽  
Eton College ◽  
Member Of Parliament

Percy Bysshe Shelley was born 200 years ago, on 4 August 1792, and was drowned near Viareggio in Italy a month before his 30th birthday, on 8 July 1822. From his schooldays onwards he was fascinated by science, and his poetry is much enriched by the infusion of scientific imagery. 1 Shelley was the eldest son of a dull country squire and Whig Member of Parliament, Timothy Shelley of Field Place near Horsham, Sussex. Sent to Eton College when he was 12 years old, Shelley rebelled against the discipline and much of the teaching; but he had the great good fortune to find an inspiring mentor in Dr James Lind, F.R.S. (1736-1812), physician to the Royal Household at Windsor: 2 the Castle and the College are only a mile apart. As a result Shelley became enthusiastic for experiment and well informed in science by the time he left Eton for Oxford at the age of 17. Why was Lind so appealing to Shelley? James Lind came from a prosperous Scottish family, and one of his lifelong friends was his cousin James Keir, F.R.S. (1735-1820), a pioneer of the modern chemical industry. 3 In his 20s Lind was also a close confidant of James Watt: it was to Lind that Watt wrote the letters about his invention in 1765 of the steam engine with separate condenser 4 . In the same year, at the age of 29, Lind sailed as a ship’s surgeon to India, the East Indies and China. He took great interest in these largely unknown lands and brought back many examples of Chinese art and manufacture, and objects of scientific interest, including specimens of corundum. Lind returned at the end of 1767, and in 1770 he became acquainted with a more famous scientific traveller, Joseph Banks, fresh from his voyage with Cook in the Endeavour . Banks and Lind planned to sail with Cook on his second voyage, but difficulties arose; 5 instead they went on an expedition to Iceland in 1772.

Anisotropic nanomaterials for asymmetric synthesis

Nanoscale ◽  
2021 ◽  
Author(s):  
Mariya A. Zvaigzne ◽  
Pavel Samokhvalov ◽  
Yurii Gun'ko ◽  
Igor Nabiev
Keyword(s):  
Chemical Synthesis ◽  
Asymmetric Synthesis ◽  
Asymmetric Catalysis ◽  
Chemical Industry ◽  
Modern Chemical ◽  
Anisotropic Nanomaterials

The production of enantiopure chemicals is an essential part of modern chemical industry. Hence, the emergence of asymmetric catalysis led to dramatic changes in the procedures of chemical synthesis, and...

scholarly journals Ethynylation of Formaldehyde over CuO/SiO2 Catalysts Modified by Mg Species: Effects of the Existential States of Mg Species

Nanomaterials ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 1137
Author(s):  
Zhipeng Wang ◽  
Lijun Ban ◽  
Pingfan Meng ◽  
Haitao Li ◽  
Yongxiang Zhao
Keyword(s):  
Synergistic Effect ◽  
Chemical Industry ◽  
Valence State ◽  
Rational Design ◽  
Catalytic Synthesis ◽  
Basic Sites ◽  
Support Interaction ◽  
Highly Dispersed ◽  
Modern Chemical

The highly effective catalytic synthesis of 1,4-butynediol (BD) from the Reppe process is a fascinating technology in modern chemical industry. In this work, we reported the effects of the existential states of Mg species in the CuO/silica-magnesia catalysts for the ethynylation of formaldehyde in a simulative slurry reactor. The physichemical properties of the supports and the corresponding catalysts were extensively characterized by various techniques. The experimental results indicated that the introduced Mg species in the form of MgO particles, MgO microcrystals, or Si-O-Mg structures effectively resulted in an abundance of medium-strong basic sites, which can synergize with the active Cu+ species, facilitate the activation of acetylene, and improve the ethynylation activity. For the CuO/MgO-SiO2 catalyst, the existence of Si-O-Mg structures strengthened the Cu–support interaction, which were beneficial to improving the dispersion and the valence stability of the active Cu+ species. The highly dispersed Cu+ species, its stable valence state, and the abundant medium-strong basic sites enhanced the synergistic effect significantly, leading to the superior activity and stability of CuO/MgO-SiO2. The insights into the role of the existential states of Mg species and the revelation of the synergistic effect between active Cu+ species and basic sites can provide theoretic guidance for future rational design of catalysts for the ethynylation reation.

Perspective on Computational Reaction Prediction using Machine Learning Methods in Heterogeneous Catalysis

2021 ◽  
Author(s):  
Jiayan Xu ◽  
Xiaoming Cao ◽  
Peijun Hu
Keyword(s):  
Machine Learning ◽  
Heterogeneous Catalysis ◽  
Significant Role ◽  
Chemical Industry ◽  
Rational Design ◽  
Learning Methods ◽  
Reaction Prediction ◽  
Machine Learning Methods ◽  
Essential Aspect ◽  
Modern Chemical

Heterogeneous catalysis plays a significant role in the modern chemical industry. Towards the rational design of novel catalysts, understanding reactions over surfaces is the most essential aspect. Typical industrial catalytic...

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